ION EXCHANGEABLE GLASS WITH ADVANTAGED STRESS PROFILE
    4.
    发明申请
    ION EXCHANGEABLE GLASS WITH ADVANTAGED STRESS PROFILE 有权
    离子交换玻璃具有优良的应力特性

    公开(公告)号:US20140227524A1

    公开(公告)日:2014-08-14

    申请号:US14174309

    申请日:2014-02-06

    CPC classification number: C03C21/002 C03C3/091 Y10T428/315

    Abstract: Ion exchangeable glass compositions that develop concentration profiles and stress profiles that have higher magnitudes of concentration and compressive stress profiles than those provided by the error function (erfc)-shaped compressive stress profile for similar surface concentrations of stress-inducing components such as K+ or K2O and stresses. The advantaged stress profile is the result of a glass composition that is low in K2O (or potassium) in the base glass prior to ion exchange. A glass comprising lower amounts of K+ or K2O has a stronger dependence of diffusivity on concentration, leading to a non-erfc-shaped concentration profile. Several glass compositions that contain low amounts of K+ or K2O exhibit this beneficial effect, whereas other glasses containing higher amounts of K+ or K2O do not exhibit this effect.

    Abstract translation: 离子交换玻璃组合物,其形成具有比用于类似表面浓度的应力诱导组分如K +或K2O的误差函数(erfc)形压缩应力分布提供的浓度分布和应力分布更高的浓度分布和压应变曲线 并强调。 有利的应力分布是在离子交换之前在基础玻璃中的K 2 O(或钾)低的玻璃组合物的结果。 包含较低量的K +或K2O的玻璃具有较强的扩散性对浓度的依赖性,导致非erfc形浓度分布。 含有少量K +或K2O的几种玻璃组合物表现出这种有益效果,而含有较高量的K +或K2O的其它玻璃没有表现出这种效果。

    PERALUMINOUS LITHIUM ALUMINOSILICATES WITH HIGH LIQUIDUS VISCOSITY

    公开(公告)号:US20190127265A1

    公开(公告)日:2019-05-02

    申请号:US16175016

    申请日:2018-10-30

    Abstract: The embodiments described herein relate to glass articles that include mechanically durable glass compositions having high liquidus viscosity. The glass articles may include glass compositions having from 50 mol. % to 80 mol. % SiO2; from 7 mol. % to 25 mol. % Al2O3; from 2 mol. % to about 14 mol. % Li2O; 0.4 mol. % P2O5; and less than or equal to 0.5 mol. % ZrO2. The quantity (Al2O3 (mol. %)−R2O (mol. %)−RO (mol. %)) is greater than zero, where R2O (mol. %) is the sum of the molar amounts of Li2O, Na2O, K2O, Rb2O, and Cs2O in the glass composition and RO (mol. %) is the sum of the molar amounts of BeO, MgO, CaO, SrO, BaO, and ZnO in the glass composition. A molar ratio of (Li2O (mol. %))/(R2O (mol. %)) may be greater or equal to 0.5. In embodiments, the glass composition may include B2O3. The glass compositions are fusion formable and have high damage resistance.

Patent Agency Ranking